raised christian, went to college in boston, met tamerlan. she converted to islam, and by all accounts, fairly devout, wore the hajaab, the traditional head scarf. she didn't speak russian, so she wasn't always aware what was being said, she didn't understand the language being spoken around the house. wolf. >> chris lawrence reporting for us. just ahead, still many unanswered questions in the boston marathon terror attack. investigators work to interview the only suspect still alive. new insights into the investigation. stay with our special coverage. ♪ [ male announcer ] a car that can actually see like a human, using stereoscopic cameras. ♪ and even stop itself if it has to. ♪ the technology may be hard to imagine. but why you would want it... is not. the 2014 e-class. it doesn't just see the future. it is the future. [ sneezing ] she may be muddling through allergies. try zyrtec®. powerful allergy relief for adults and kids six years and older. zyrtec®. love the air. >>> there are hundreds of questions that investigators have for